Since I got the CPP crossmember modified to fit between the frame, I decided to mount it to the trans and see if I could find the 3 degree angle while still being able to remove the steering rack.
I've come up with a solution. I trimmed the trans cover lip back about .75" and it makes just enough space for the trans to reach the mount, the valve covers to stay at least .75" from the firewall, and the CTS-V pan doesnt interfere with the steering rack. Although I don't regret the purchase, I may even have been able to get away with a regular rebuilt rack vs. the clocked one I got from Don at Flatout.
I should be able to modify the trans tunnel cover and still bolt it to the factory location since there is a small amount of recessed lip left there.